" إِذَا دَخَلَ رَمَضَانُ فُتِّحَتْ أَبْوَابُ الرَّحْمَةِ وَغُلِّقَتْ أَبْوَابُ جَهَنَّمَ وَسُلْسِلَتِ الشَّيَاطِينُ "
It was narrated Az-Zuhri, from Abu Hurairah that the Prophet said: "When Ramadan begins, the gates of mercy are opened and the gates of Hall are closed, and the devils are chained up."